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J . Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Matthias Brugger , , , , , , Subject: [PATCH v6,02/24] v4l2: handle restricted memory flags in queue setup Date: Thu, 16 May 2024 20:20:40 +0800 Message-ID: <20240516122102.16379-3-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240516122102.16379-1-yunfei.dong@mediatek.com> References: <20240516122102.16379-1-yunfei.dong@mediatek.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N From: Jeffrey Kardatzke Validates the restricted memory flags when setting up a queue and ensures the queue has the proper capability. Signed-off-by: Jeffrey Kardatzke Signed-off-by: Yunfei Dong --- .../media/common/videobuf2/videobuf2-core.c | 21 +++++++++++++++++++ .../media/common/videobuf2/videobuf2-v4l2.c | 4 +++- 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 358f1fe42975..fe4c0594ab81 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -831,6 +831,15 @@ static bool verify_coherency_flags(struct vb2_queue *q, bool non_coherent_mem) return true; } +static bool verify_restricted_mem_flags(struct vb2_queue *q, bool restricted_mem) +{ + if (restricted_mem != q->restricted_mem) { + dprintk(q, 1, "restricted memory model mismatch\n"); + return false; + } + return true; +} + static int vb2_core_allocated_buffers_storage(struct vb2_queue *q) { if (!q->bufs) @@ -864,6 +873,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int q_num_bufs = vb2_get_num_buffers(q); unsigned plane_sizes[VB2_MAX_PLANES] = { }; bool non_coherent_mem = flags & V4L2_MEMORY_FLAG_NON_COHERENT; + bool restricted_mem = flags & V4L2_MEMORY_FLAG_RESTRICTED; unsigned int i, first_index; int ret = 0; @@ -907,6 +917,9 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, return 0; } + if (restricted_mem && (!q->allow_restricted_mem || memory != VB2_MEMORY_DMABUF)) + return -EINVAL; + /* * Make sure the requested values and current defaults are sane. */ @@ -924,6 +937,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, if (ret) return ret; set_queue_coherency(q, non_coherent_mem); + q->restricted_mem = restricted_mem; /* * Ask the driver how many buffers and planes per buffer it requires. @@ -1032,6 +1046,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, unsigned plane_sizes[VB2_MAX_PLANES] = { }; bool non_coherent_mem = flags & V4L2_MEMORY_FLAG_NON_COHERENT; unsigned int q_num_bufs = vb2_get_num_buffers(q); + bool restricted_mem = flags & V4L2_MEMORY_FLAG_RESTRICTED; bool no_previous_buffers = !q_num_bufs; int ret = 0; @@ -1040,6 +1055,9 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, return -ENOBUFS; } + if (restricted_mem && (!q->allow_restricted_mem || memory != VB2_MEMORY_DMABUF)) + return -EINVAL; + if (no_previous_buffers) { if (q->waiting_in_dqbuf && *count) { dprintk(q, 1, "another dup()ped fd is waiting for a buffer\n"); @@ -1058,6 +1076,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, return ret; q->waiting_for_buffers = !q->is_output; set_queue_coherency(q, non_coherent_mem); + q->restricted_mem = restricted_mem; } else { if (q->memory != memory) { dprintk(q, 1, "memory model mismatch\n"); @@ -1065,6 +1084,8 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, } if (!verify_coherency_flags(q, non_coherent_mem)) return -EINVAL; + if (!verify_restricted_mem_flags(q, restricted_mem)) + return -EINVAL; } num_buffers = min(*count, q->max_num_buffers - q_num_bufs); diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index 293f3d5f1c4e..9ee24e537e0c 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -682,7 +682,7 @@ static void vb2_set_flags_and_caps(struct vb2_queue *q, u32 memory, *flags = 0; } else { /* Clear all unknown flags. */ - *flags &= V4L2_MEMORY_FLAG_NON_COHERENT; + *flags &= V4L2_MEMORY_FLAG_NON_COHERENT | V4L2_MEMORY_FLAG_RESTRICTED; } *caps |= V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS; @@ -698,6 +698,8 @@ static void vb2_set_flags_and_caps(struct vb2_queue *q, u32 memory, *caps |= V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS; if (q->supports_requests) *caps |= V4L2_BUF_CAP_SUPPORTS_REQUESTS; + if (q->allow_restricted_mem && q->io_modes & VB2_DMABUF) + *caps |= V4L2_BUF_CAP_SUPPORTS_RESTRICTED_MEM; if (max_num_bufs) { *max_num_bufs = q->max_num_buffers; *caps |= V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS;